I have installed Ubuntu with dual boot to a preinstalled windows 8 on a Lenovo E-135. I disabled fast start in windows 8 before installation and shrank the partition to give place for Ubuntu. All went well and the installer went on very smoothly. After restart Ubuntu booted perfectly.....

And then I tried to restart to boot into windows 8 but no entries suggestion any windows partition. I restarted into Ubuntu and ran Boot repair. All went well and after the next reboot a lot of entries were present suggesting some could be the windows entry.. But nothing allowed Windows 8 to start.

Some options reported that they were forbidden for secure-boot and others reported that a file was missing.

I looked at the Boot repair report but I can not understand what it tells me. So what shall I do to make Windows 8 start also??

2 Answers
2

I had issues with BIOS-set SecureBoot disallowing entry into my Windows 8 partitions - but, it appears that I've been able to reenable it now after getting GRUB finalized and Ubuntu/Windows setup the way I like.

FWIW, through version 13.04, Ubuntu seems to be shipping with the older shim 0.1, whereas shim 0.2 is the current version. This could be why Ubuntu users seem to be having so many problems with Secure Boot. It's possible to upgrade by using a shim binary from Fedora, OpenSUSE, or Matthew Garrett (shim's creator), but then you'll need to add Ubuntu's public key using a tool called MokManager. See my Web page on Secure Boot for details. It's probably easier to disable Secure Boot than to jump through these hoops.
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Rod SmithMay 11 '13 at 0:27